455e Rancher 455 Rancher 460 Rancher - ator's manual
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Operator’s manual
455e Rancher
Original instructions 455 Rancher 460 Rancher
The engine exhaust from this product Please read the operator’s manual carefully and make sure you understand the instructions
contains chemical known to the State before using the machine. English
of California to cause cancer, birth 1153137-95
defects or other reproductive harm.
2009-12-29KEY TO SYMBOLS AMERICAN STANDARD SAFETY PRECAUTIONS
Symbols on the machine: Symbols in the operator’s Safety precautions for chain saw Other safety precautions
WARNING! Chain saws can be dangerous! manual: users WARNING! Do not operate a chain saw
Careless or improper use can result in
serious or fatal injury to the operator or
Switch off the engine by moving the
stop switch to the STOP position
(ANSI B175.1-2000 Annex C) ! with one hand! Serious injury to the
operator, helpers, bystanders or any
others.
before carrying out any checks or Kickback safety precautions combination of these persons may result
Please read the operator’s manual maintenance. from one-handed operation. A chain saw
carefully and make sure you is intended for two-handed use.
WARNING! Kickback may occur when
understand the instructions before
using the machine. ! the nose or tip of the guide bar touches
an object, or when the wood closes in Do not operate a chain saw when you are fatigued.
Always wear: Always wear approved protective and pinches the saw chain in the cut. Use safety footwear; snug-fitting clothing, protective
• Approved protective helmet gloves. gloves, and eye, hearing and head protection devices.
• Approved hearing protection Tip contact in some cases may cause a
lightning fast reverse reaction, kicking Use caution when handling fuel. Move the chain saw at
• Protective goggles or a visor
the guide bar up and back towards the least 10 feet (3 m) from the fueling point before starting
operator. the engine.
Both of the operator′s hands must be Regular cleaning is required. Do not allow other persons to be near the chain saw when
Pinching the saw chain along the top of starting or cutting with the chain saw. Keep bystanders
used to operate the chain saw.
the guide bar may push the guide bar and animals out of the work area.
rapidly back towards the operator.
Do not start cutting until you have a clear work area,
Either of these reactions may cause you secure footing and a planned retreat path from the falling
Never operate a chain saw holding it with Visual check. to lose control of the saw which could tree.
one hand only. result in serious personal injury. Keep all parts of your body away from the saw chain when
the engine is running.
Do not rely exclusively upon the safety
devices built into your saw. As a chain Before you start the engine, make sure that the saw chain
Contact of the guide bar tip with any Protective goggles or a visor must saw user, you should take several steps is not contacting anything.
object must be avoided. be worn. to keep your cutting jobs free from Carry the chain saw with the engine stopped, the guide
accident or injury. bar and saw chain to the rear, and the muffler away from
your body.
WARNING! Kickback may occur when
the nose or tip of the guide bar touches With a basic understanding of kickback, you can reduce Do not operate a chain saw that is damaged, improperly
an object, and cause a lightning fast or eliminate the element of surprise. Sudden surprise adjusted, or not completely and securely assembled. Be
reverse reaction, kicking the guide bar Refuelling. contributes to accidents. sure that the saw chain stops moving when the throttle
up and towards the operator. May control trigger is released.
Keep a good firm grip on the saw with both hands, the
cause serious personal injury. right hand on the rear handle, and the left hand on the Shut off the engine before setting the chain saw down.
front handle, when the engine is running. Use a firm grip Use extreme caution when cutting small size brush and
Chain brake, activated (right) with thumbs and fingers encircling the chain saw handles. saplings because slender material may catch the saw
Chain brake, not activated Filling with oil and adjusting oil flow. A firm grip will help you reduce kickback and maintain chain and be whipped toward you or pull you off balance.
(left) control of the saw. Don’t let go. When cutting a limb that is under tension be alert for
Make sure that the area in which you are cutting is free springback so that you will not be struck when the tension
from obstacles. Do not let the nose of the guide bar in the wood fibers is released.
The chain brake must be engaged contact a log, branch, or any other obstacle which could Keep handles dry, clean and free of oil or fuel mixture.
Other symbols/decals on the machine refer to special
when the chain saw is started. be hit while you are operating the saw.
certification requirements for certain markets. Operate the chain saw only in well-ventilated areas.
Cut at high engine speeds. Do not operate a chain saw in a tree unless you have
Do not overreach or cut above shoulder height. been specifically trained to do so.
WARNING! Kickback may occur
when the nose or tip of the guide bar Follow manufacturer’s sharpening and maintenance Do not operate a chain saw above shoulder height.
touches an object, and cause a lightning instructions for the saw chain. All chain saw service, other than the items listed in the
fast reverse reaction, kicking the guide Only use replacement bars and chains specified by the operator’s/owner’s safety and maintenance instructions,
bar up and towards the operator. May manufacturer or the equivalent. should be performed by competent chain saw service
cause serious personal injury. personnel. (For example, if improper tools are used to
remove the flywheel or if an improper tool is used to hold
the flywheel in order to remove the clutch, structural
damage to the flywheel could occur and subsequently
cause the flywheel to burst.)
When transporting your chain saw, use the appropriate
guide bar guard.
Note: This Annex is intended primarily for the consumer or
occasional user.
2 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 43FEDERAL EMISSION CONTROL WARRANTY STATEMENT KEY TO SYMBOLS
MAINTENANCE, REPLACEMENT AND You will find the following labels on your chain saw:
REPAIR OF EMISSION-RELATED PARTS
Any Husqvarna Forest & Garden approved replacement
part used in the performance of any warranty
maintenance or repairs on emission-related parts, will be
provided without charge to the owner if the part is under
warranty.
EMISSION CONTROL WARRANTY PARTS
LIST
Chain Saw
IN ACCORDANCE WITH
1 Carburetor and internal parts ANSI B175.1-2000
2 Intake pipe, airfilter holder and carburetor bolts.
3 Airfilter and fuelfilter covered up to maintenance EPA III
schedule.
4 Spark Plug, covered up to maintenance schedule
5 Ignition Module
MAINTENANCE STATEMENT
The owner is responsible for the performance of all
required maintenance, as defined in the operator’s
manual. The Emissions Compliance Period referred to on the
Emission Compliance label indicates the number of
operating hours for which the engine has been shown to
meet Federal emissions requirements.
Maintenance, replacement, or repair of the emission
control devices and system may be performed by any
nonroad engine repair establishment or individual.
42 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 3CONTENTS FEDERAL EMISSION CONTROL WARRANTY STATEMENT
Contents FEDERAL EMISSION CONTROL WARRANTY YOUR WARRANTY RIGHTS AND LENGTH OF COVERAGE
STATEMENT
KEY TO SYMBOLS
YOUR WARRANTY RIGHTS AND OBLIGATIONS 41
OBLIGATIONS Husqvarna Forest & Garden warrants to the initial owner
Symbols on the machine: ...................................... 2 and each subsequent purchaser that the engine is free
AMERICAN STANDARD SAFETY The EPA (The US Environmental Protection Agency), from defects in materials and workmanship which cause
Symbols in the operator’s manual: ........................ 2 Environment Canada and Husqvarna Forest & Garden
PRECAUTIONS the failure of a warranted part for a period of two years.
CONTENTS are pleased to explain the emissions control system
Safety precautions for chain saw users ................ 43
Contents ............................................................... 4 warranty on your 2009 and later small nonroad engine. In WHAT IS COVERED
INTRODUCTION U.S. and Canada, new small nonroad engines must be
REPAIR OR REPLACEMENT OF PARTS Repair or
designed, built and equipped to meet the federal stringent
Dear customer! ..................................................... 5 replacement of any warranted part will be performed at no
anti-smog standards. Husqvarna Forest & Garden must
WHAT IS WHAT? charge to the owner at an approved Husqvarna Forest &
warrant the emission control system on your small
Garden servicing dealer. If you have any questions
What is what on the chain saw? ........................... 6 nonroad engine for the period of time listed below
regarding your warranty rights and responsibilities, you
GENERAL SAFETY PRECAUTIONS provided there has been no abuse, neglect or improper
should contact your nearest authorized servicing dealer
maintenance of your unit. Your emission control system
Before using a new chain saw .............................. 7 or call Husqvarna Forest & Garden at 1-800-487-5951 or
includes Parts such as the carburetor and the ignition
Important .............................................................. 7 visit www.usa.husqvarna.com.
system. Where a warrantable condition exists, Husqvarna
Always use common sense .................................. 7 Forest & Garden will repair your small nonroad engine at WARRANTY PERIOD Any warranted part which is not
no cost to you. Expenses covered under warranty include scheduled for replacement as required maintenance, or
Personal protective equipment ............................. 8
diagnosis, parts and labor. which is scheduled only for regular inspection to the effect
Machine′s safety equipment ................................. 8 of “repair or replace as necessary” shall be warranted for
Cutting equipment ................................................. 11 MANUFACTURER′S WARRANTY 2 years. Any warranted part which is scheduled for
ASSEMBLY COVERAGE replacement as required maintenance shall be warranted
for the period of time up to the first scheduled
Fitting the bar and chain ....................................... 17 The 2009 and later small nonroad engines are warranted replacement point for that part.
FUEL HANDLING for two years. If any emission related part on you engine
(as listed above) is defective, the part will be repaired or DIAGNOSIS The owner shall not be charged for
Fuel ....................................................................... 19
replaced by Husqvarna Forest & Garden. diagnostic labor which leads to the determination that a
Fueling .................................................................. 20 warranted part is defective, if the diagnostic work is
Fuel safety ............................................................ 20 OWNER′S WARRANTY performed at an approved Husqvarna Forest & Garden
STARTING AND STOPPING servicing dealer.
RESPONSIBILITIES
Star ting and stopping ............................................ 21 CONSEQUENTIAL DAMAGES Husqvarna Forest &
As the small nonroad engine owner, you are responsible Garden may be liable for damages to other engine
WORKING TECHNIQUES for the performance of the required maintenance listed in components caused by the failure of a warranted part still
Before use: ............................................................ 23 your Operator′s Manual. Husqvarna Forest & Garden under warranty.
General working instructions ................................ 23 recommends that you retain all receipts covering
How to avoid kickback ........................................... 29
maintenance on your small nonroad engine, but WHAT IS NOT COVERED
Husqvarna Forest & Garden cannot deny warranty solely
MAINTENANCE for the lack of receipts or for your failure to ensure the All failures caused by abuse, neglect or improper
General ................................................................. 31 performance of all scheduled maintenance. As the small maintenance are not covered.
Carburetor adjustment .......................................... 31 nonroad engine owner, you should, however, be aware ADD -ON OR MODIFIED PARTS
Checking, maintaining and servicing chain saw that Husqvarna Forest & Garden may deny you warranty
The use of add-on or modified parts can be grounds for
safety equipment .................................................. 32 coverage if your small nonroad engine or a part of it has
disallowing a warranty claim. Husqvarna Forest & Garden
failed due to abuse, neglect, improper maintenance,
Muffler ................................................................... 34 is not liable to cover failures of warranted parts caused by
unapproved modifications or the use of parts not made or
Starter ................................................................... 34 the use of add-on or modified parts.
approved by the original equipment manufacturer. You are
Air filter .................................................................. 35 responsible for presenting your small nonroad engine to a HOW TO FILE A CLAIM
Spark plug ............................................................. 36 Husqvarna Forest & Garden authorized servicing dealer
as soon as a problem exists. The warranty repairs should If you have any questions regarding your warranty rights
Lubricating the bar tip sprocket ............................. 36 be completed in a reasonable amount of time, not to and responsibilities, you should contact your nearest
Needle bearing lubrication .................................... 36 exceed 30 days. If you have any questions regarding your authorized servicing dealer or call Husqvarna Forest &
Adjustment of the oil pump ................................... 36 warranty rights and responsibilities, you should contact Garden at 1-800-487-5951 or visit
your nearest authorized servicing dealer or call www.usa.husqvarna.com.
Cooling system ..................................................... 36
Husqvarna Forest & Garden at 1-800-487-5951 or visit
”Air Injection” centrifugal cleaning ......................... 37 www.usa.husqvarna.com. WHERE TO GET WARRANTY SERVICE
Winter use ............................................................. 37 Warranty services or repairs shall be provided at all
Maintenance schedule .......................................... 38 WARRANTY COMMENCEMENT DATE Husqvarna Forest & Garden authorized servicing dealers.
TECHNICAL DATA The warranty period begins on the date small nonroad
Technical data ....................................................... 39 engine is delivered.
Saw chain filing and file gauges ........................... 40
4 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 41TECHNICAL DATA INTRODUCTION
Recommended original and replacement bar and chain combinations Dear customer!
Following is a list of recommended cutting equipment for the Husqvarna chain saw model 455 Rancher, 455e Rancher Congratulations on your choice to buy a Husqvarna product! Husqvarna is based on a tradition that dates back to 1689,
and 460 Rancher. The combinations of power head, bar and chain have been tested and found to be in accordance with when the Swedish King Karl XI ordered the construction of a factory on the banks of the Huskvarna River, for production
the kickback requirements of ANSI B175.1–2000. of muskets. The location was logical, since water power was harnessed from the Huskvarna River to create the water-
The guide bar nose radius is determined by either the maximum number of teeth in the nose sprocket or the powered plant. During over 300 years of continuous operation, the Husqvarna factory has produced a lot of different
corresponding maximum nose radius of a solid bar. products, from wood stoves to modern kitchen appliances, sewing machines, bicycles, motorcycles etc. In 1956, the first
motor driven lawn mowers appeared, followed by chain saws in 1959, and it is within this area Husqvarna is working
The following list is the chain saw manufacturers recommendations. There may be other combinations available, which today.
will also achieve kickback reduction.
Today Husqvarna is one of the leading manufacturers in the world of forest and garden products, with quality as our
As we are listing the maximum guide bar nose radius, you may use a guide bar with smaller nose radius than in our list. highest priority. We develop, manufacture and market high quality motor driven products for forestry and gardening as
For guide bars of the same length, all sprocket-nose guide bars of the same pitch and having the same number of well as for building and construction industry.
sprocket teeth may be considered to have equivalent kickback energy. A hard nose bar having the same length and nose
radius as a sprocket-nose bar may be considered to have equivalent or less kickback energy than the sprocket-nose bar. Your purchase gives you access to professional help with repairs and service whenever this may be necessary. If the
retailer who sells your machine is not one of our authorized dealers, ask for the address of your nearest servicing dealer.
Low kickback saw chain is a chain which has only met the kickback performance requirements of ANSI B 175.1 safety
requirements for gasoline powered chain saws when tested on the representative sample of chain saws below 3.8 cu. It is our wish that you will be satisfied with your product and that it will be your companion for a long time. Think of this
in. specified in ANSI 175.1. We recommend that you as a replacement use the listed chains or "Low kickback saw chains" operator′s manual as a valuable document. By following its′ content (using, service, maintenance etc) the life span and
which are available at your dealer. Saw chains Husqvarna H81 and H80 are both examples of listed ”Low kickback the second-hand value of the machine can be extended. If you ever lend or sell this machine, make sure that the
sawchains”. borrower or buyer gets the operator′s manual, so they will also know how to properly maintain and use it.
Thank you for using a Husqvarna product.
Bar Chain
Drive link Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design and
Length, inch Pitch, inch Gauge, inch Max. nose radius Type
count appearance of products without prior notice.
15 3/8 11T 56
16 3/8 11T 60 For customer assistance, contact us at our website: www.usa.husqvarna.com
Husqvarna H80,
18 3/8 0,050 11T Husqvarna H46, 68
Husqvarna H47
20 3/8 11T 72
24 3/8 11T 84
Note: For the saw chains above (if available) you are free to choose between 0,050" or 0,058" gauge drive links for the
corresponding bar, see the table below.
Gauge, in. Saw chain designation
0,050 H80 H46 H47
0,058 H81 H42 H48
Saw chain filing and file gauges
40 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 5WHAT IS WHAT? TECHNICAL DATA
Technical data
29 1 455e Rancher 455 Rancher 460 Rancher
2 Motor
Cylinder displacement, cu.in/cm3 3,38/55,5 3,38/55,5 3,68/60,3
3
Cylinder bore, inch/mm 1,85/47 1,85/47 1,93/49
4 Stroke, inch/mm 1,26/32 1,26/32 1,26/32
Idle speed, rpm 2700 2700 2700
30 Power, kW/hp @ rpm 2,6/3,5 @ 9000 2,6/3,5 @ 9000 2,7/3,7 @ 9000
10 Ignition system
23 31 32
5 NGK BPMR 7A/ NGK BPMR 7A/ NGK BPMR 7A/
Spark plug
Champion RCJ 7Y Champion RCJ 7Y Champion RCJ 7Y
Electrode gap, inch/mm 0,02/0,5 0,02/0,5 0,02/0,5
9 8 7 6 Fuel and lubrication system
11 12 13 14 Fuel tank capacity, US pint/litre 0,93/0,44 0,93/0,44 0,93/0,44
27 Oil pump capacity at 9,000 rpm, ml/min 6-17 6-17 6-17
Oil tank capacity, US pint/litre 0,68/0,32 0,68/0,32 0,68/0,32
Type of oil pump Automatic Automatic Automatic
15 Weight
16
Chain saw without bar or chain, empty tanks, lb/kg 13,0/5,9 12,8/5,8 12,8/5,8
26
28 Chain/bar
Standard bar length, inch/cm 20"/51 20"/51 20"/51
Recommended bar lengths, inch/cm 15-24”/38-61 15-24”/38-61 15-24”/38-61
25 24 23 22 21 20 19 18 17 Usable cutting length, inches/cm 14-23”/36-58 14-23”/36-58 14-23”/36-58
Pitch, inch 3/8 3/8 3/8
Thickness of drive links, inch/mm 0,050/1,3 0,050/1,3 0,050/1,3
What is what on the chain saw? 0,058/1,5 0,058/1,5 0,058/1,5
Drive sprocket type/teeth Spur/7 Spur/7 Spur/7
1 Cylinder cover 17 Chain
Chain speed at max. power, m/sec 20,0 20,0 20,0
2 Starter handle 18 Bar
3 Air purge 19 Bumper spike
4 Stop switch (Ignition on/off switch.) 20 Chain tensioning screw
5 Rear handle 21 Chain catcher
6 Choke control/Start throttle lock 22 Oil pump adjustment screw
7 Fuel tank 23 Clutch cover
8 Adjuster screws carburetor 24 Right hand guard
9 Starter 25 Throttle control
10 Chain oil tank 26 Operator’s manual
11 Throttle lockout 27 Combination spanner
12 Decompression valve 28 Bar guard
13 Front handle 29 Information and warning decal
14 Front hand guard 30 Product and serial number plate
15 Muffler 31 Chain tensioner wheel (455e Rancher)
16 Bar tip sprocket 32 Knob (455e Rancher)
6 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 39MAINTENANCE GENERAL SAFETY PRECAUTIONS
Maintenance schedule Before using a new chain saw Important
The following is a list of the maintenance that must be performed on the machine. Most of the items are described in the • Please read this manual carefully.
Maintenance section. IMPORTANT!
• Check that the cutting equipment is correctly fitted
and adjusted. See instructions under the heading This chain saw for forest service is designed for forest
Daily maintenance Weekly maintenance Monthly maintenance work such as felling, delimbing and cutting.
Assembly.
Check the brake band on the chain You should only use the saw with the bar and chain
On chain saws without a catalytic • Refuel and start the chain saw. See the instructions
brake for wear. Replace when less combinations we recommend in the chapter Technical
Clean the outside of the machine. converter, check the cooling system under the headings Fuel Handling and Starting and
than 0.024 inch (0.6 mm) remains at data.
weekly. Stopping.
the most worn point.
• Do not use the chain saw until sufficient chain oil has Never use the machine if you are fatigued, while under
Check that the components of the the influence of alcohol or drugs, medication or anything
Check the starter, starter cord and Check the clutch centre, clutch drum reached the chain. See instructions under the
throttle control work safely. (Throttle that could affect your vision, alertness, coordination or
return spring. and clutch spring for wear. heading Lubricating cutting equipment.
lockout and throttle control.) judgement.
• Long-term exposure to noise can result in permanent
Clean the chain brake and check that hearing impairment. So always use approved hearing Wear personal protective equipment. See instructions
it operates safely. Make sure that the Check that the vibration damping Clean the spark plug. Check that the protection. under the heading ”Personal protective equipment”.
chain catcher is undamaged, and elements are not damaged. electrode gap is 0.020 inch (0.5 mm).
Do not modify this product or use it if it appears to have
replace it if necessary.
WARNING! Under no circumstances may been modified by others.
The bar should be turned daily for
more even wear. Check the
! the design of the machine be modified
without the permission of the
Never use a machine that is faulty. Carry out the checks,
maintenance and service instructions described in this
lubrication hole in the bar, to be sure it manufacturer. Always use genuine manual. Some maintenance and service measures
Lubricate the clutch drum bearing. Clean the outside of the carburetor.
is not clogged. Clean the bar groove. accessories. Non-authorized must be carried out by trained and qualified specialists.
If the bar has a sprocket tip, this modifications and/or accessories can
See instructions under the heading Maintenance.
should be lubricated. result in serious personal injury or the
death of the operator or others. Your Never use any accessories other than those
Check that the bar and chain are File off any burrs from the edges of Check fuel hose for cracks or other warranty may not cover damage or recommended in this manual. See instructions under
getting sufficient oil. the bar. damage. Change if necessary. liability caused by the use of non- the headings Cutting equipment and Technical data.
Check the saw chain with regard to authorized accessories or replacement CAUTION! Always wear protective glasses or a face
visible cracks in the rivets and links, parts. visor to reduce the risk of injury from thrown objects. A
whether the saw chain is stiff or Clean or replace the spark arrestor Empty the fuel tank and clean the chain saw is capable of throwing objects, such as wood
whether the rivets and links are screen on the muffler. inside. chips, small pieces of wood, etc, at great force. This can
WARNING! A chain saw is a dangerous
abnormally worn. Replace if
necessary. ! tool if used carelessly or incorrectly and
can cause serious, even fatal injuries. It
result in serious injury, especially to the eyes.
Sharpen the chain and check its is very important that you read and
WARNING! Running an engine in a
tension and condition. Check the Empty the oil tank and clean the understand the contents of this
drive sprocket for excessive wear and
Clean the carburetor compartment.
inside. operator’s manual. ! confined or badly ventilated area can
result in death due to asphyxiation or
replace if necessary. carbon monoxide poisoning.
Clean the air filter. Replace if WARNING! The inside of the muffler
Clean the starter units air intake. Check all cables and connections.
necessary.
! contain chemicals that may be
carcinogenic. Avoid contact with these
WARNING! Faulty cutting equipment or
Check that nuts and screws are tight.
Check that the stop switch works
elements in the event of a damaged ! the wrong combination of bar and saw
chain increases the risk of kickback!
muffler.
correctly. Only use the bar/saw chain combinations
we recommend, and follow the filing
Check that there are no fuel leaks instructions. See instructions under the
WARNING! Long term inhalation of the
from the engine, tank or fuel lines.
On chain saws with a catalytic
! engine’s exhaust fumes, chain oil mist
and dust from sawdust can represent a
heading Technical data.
converter, check the cooling system health risk. Always use common sense
daily.
It is not possible to cover every conceivable situation you
WARNING! This machine produces an can face when using a chain saw. Always exercise care
! electromagnetic field during operation.
This field may under some
and use your common sense. Avoid all situations which
you consider to be beyond your capability. If you still feel
circumstances interfere with active or uncertain about operating procedures after reading these
passive medical implants. To reduce the instructions, you should consult an expert before
risk of serious or fatal injury, we continuing. Do not hesitate to contact your dealer or us if
recommend persons with medical you have any questions about the use of the chain saw.
implants to consult their physician and
We will willingly be of service and provide you with advice
the medical implant manufacturer before
as well as help you to use your chain saw both efficiently
operating this machine.
and safely. Attend a training course in chain saw usage if
38 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 7GENERAL SAFETY PRECAUTIONS MAINTENANCE
possible. Your dealer, forestry school or your library can Generally clothes should be close-fitting without 5 Cylinder cover (directs cold air over the cylinder). Temperature 0°C (32°F) or colder:
provide information about which training materials and restricting your freedom of movement.
courses are available.
IMPORTANT! Sparks can come from the muffler, the bar
and chain or other sources. Always have fire
extinguishing tools available if you should need them. The cylinder cover is designed so it can be adjusted for
Help prevent forest fires. running in cold weather, so that preheated air from the
cylinder can pass into the carburetor space preventing
icing of the air filter, etc.
Machine′s safety equipment
In this section the machine’s safety features and their
function are explained. For inspection and maintenance
see instructions under the heading Checking, maintaining Clean the cooling system with a brush once a week, more
and servicing chain saw safety equipment. See often in demanding conditions. A dirty or blocked cooling
instructions under the heading, What is what?, to find system results in the machine overheating which causes
Work is constantly in progress to improve the design and where these parts are located on your machine. damage to the piston and cylinder.
technology - improvements that increase your safety and The life span of the machine can be reduced and the risk
efficiency. Visit your dealer regularly to see whether you of accidents can increase if machine maintenance is not ”Air Injection” centrifugal
can benefit from new features that have been introduced. carried out correctly and if service and/or repairs are not
carried out professionally. If you need further information cleaning
Personal protective equipment please contact your nearest servicing dealer.
Centrifugal cleaning means the following: All air to the
carburetor passes through the starter. Dirt and dust is
WARNING! Most chain saw accidents WARNING! Never use a machine with pushed out by the cooling fan.
! happen when the chain touches the ! defective safety components. Safety
equipment must be inspected and
Temperature -5°C (23°F) or colder:
operator. You must use approved
maintained. See instructions under the
personal protective equipment whenever
heading Checking, maintaining and
you use the machine. Personal protective
servicing chain saw safety equipment. If
equipment cannot eliminate the risk of your machine does not pass all the For running the machine in cold weather or powder snow,
injury but it will reduce the degree of checks, take the saw to a servicing
injury if an accident does happen. Ask a special cover is available, which is mounted on the
dealer for repair. starter housing. This reduces the intake of cold air and
your dealer for help in choosing the right
equipment. prevents large amounts of snow from being sucked in.
Chain brake and front hand guard
Your chain saw is equipped with a chain brake that is
designed to stop the chain if you get a kickback. The chain
IMPORTANT! In order to maintain operation of the
brake reduces the risk of accidents, but only you can
centrifugal cleaning system it must be regularly
prevent them.
maintained. Clean the air intake to the starter, the fins on
the flywheel, the space around the flywheel, inlet pipe and
carburetor compartment.
Winter use
Take care when using your saw and make sure the Running problems can occur when using the machine in
kickback zone of the bar never touches any object. the cold and snowy conditions caused by:
• Too low engine temperature.
• Approved protective helmet
• Icing of the air filter and carburetor. CAUTION! If the special winterising kit has been fitted or
• Hearing protection
any measures have been taken to increase the
• Protective goggles or a visor Special measures are therefore often required:
temperature these changes must be reversed before the
• Gloves with saw protection • Partly mask the air inlet on the starter to increase the machine is used in normal temperature conditions.
• Trousers with saw protection working temperature of the engine. Otherwise there is a risk of overheating, resulting in
• Boots with saw protection, steel toe-cap and non-slip • The chain brake (A) can either be activated manually severe damage to the engine.
sole (by your left hand) or automatically by the inertia IMPORTANT! Any maintenance other than that described
• Always have a first aid kit nearby. release mechanism. in this manual must be carried out by your servicing
• Fire Extinguisher and Shovel • The brake is applied when the front hand guard (B) is dealer (retailer).
pushed forwards.
8 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 37MAINTENANCE GENERAL SAFETY PRECAUTIONS
Spark plug When lubricating, remove the clutch cover by loosening • This movement activates a spring-loaded mechanism • Kickback can be very sudden and violent. Most
the two bar nuts. Lay the saw on its side with the clutch that tightens the brake band (C) around the engine kickbacks are minor and do not always activate the
drum upwards. drive system (D) (clutch drum). chain brake. If this happens you should hold the chain
Lubrication involves engine oil dripping into the centre of saw firmly and not let go.
the clutch drum as it rotates.
The spark plug condition is influenced by:
• Incorrect carburetor adjustment.
• An incorrect fuel mixture (too much or incorrect type
of oil).
• A dirty air filter.
These factors cause deposits on the spark plug
electrodes, which may result in operating problems and • The way the chain brake is activated, either manually
starting difficulties. or automatically by the inertia release mechanism,
• The front hand guard is not designed solely to activate depends on the force of the kickback and the position
If the machine is low on power, difficult to start or runs the chain brake. Another important feature is that it
poorly at idle speed: always check the spark plug first Adjustment of the oil pump reduces the risk of your left hand hitting the chain if
of the chain saw in relation to the object that the
before taking any further action. If the spark plug is dirty, kickback zone of the bar strikes.
you lose grip of the front handle.
clean it and check that the electrode gap is 0.020 inch (0.5 If you get a violent kickback while the kickback zone of
mm). The spark plug should be replaced after about a the bar is farthest away from you the chain brake is
month in operation or earlier if necessary. designed to be activated by the inertia in the kickback
Adjustments are made by turning the screw using a direction.
screwdriver or combination spanner. The machine is
supplied from the factory with the screw set to position 2.
Turning the screw clockwise will reduce the oil flow and
turning the screw anti-clockwise will increase the oil flow.
• The chain brake must be engaged when the chain
saw is started to prevent the saw chain from rotating.
Note! Always use the recommended spark plug type! Use
of the wrong spark plug can damage the piston/cylinder.
Check that the spark plug is fitted with a suppressor.
If the kickback is less violent or the kickback zone of
Lubricating the bar tip sprocket Recommended settings:
• Use the chain brake as a ”parking brake” when
the bar is closer to you the chain brake is designed to
starting and when moving over short distances, to
Bar 13"-15": Position 1 be activated manually by the movement of your left
reduce the risk of moving chain accidentally hitting
hand.
Bar 16"-18": Position 2 your leg or anyone or anything close by.
Lubricate the bar tip sprocket each time you refuel. Use Bar 20"-24": Position 3
the special grease gun and a good quality bearing grease.
These recommendations apply to Husqvarna’s chain oil,
for other chain oils increase the oil flow by one step.
WARNING! The engine must be stopped
! when making adjustments. • In the felling position the left hand is in a position that
makes manual activation of the chain brake
impossible. With this type of grip, that is when the left
hand is placed so that it cannot affect the movement
Cooling system of the front hand guard, the chain brake can only be
activated by the inertia action.
• To release the chain brake pull the front hand guard
Needle bearing lubrication backwards, towards the front handle.
To keep the working temperature as low as possible the
machine is equipped with a cooling system.
The cooling system consists of:
The clutch drum has a needle bearing on the output shaft.
This needle bearing must be lubricated regularly (once a 1 Air intake on the starter.
week). 2 Air guide plate.
3 Fins on the flywheel.
4 Cooling fins on the cylinder.
36 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 9GENERAL SAFETY PRECAUTIONS MAINTENANCE
Will my hand always activate the chain Chain catcher recoil spring by letting the pulley rotate slowly • Lubricate the recoil spring with light oil. Fit the pulley
backwards. and tension the recoil spring.
brake during a kickback? The chain catcher is designed to catch the chain if it
No. It takes a certain force to move the hand guard snaps or jumps off. This should not happen if the chain is 1 2
forward. If your hand only lightly touches the front guard properly tensioned (see instructions under the heading
or slips over it, the force may not be enough to trigger the Assembly) and if the bar and chain are properly serviced
chain brake. You should also maintain a firm grip of the and maintained (see instructions under the heading
chain saw handles while working. If you do and General working instructions).
experience a kickback, your hand may never leave the
front handle and will not activate the chain brake, or the
chain brake will only activate after the saw has swung
around a considerable distance. In such instances, the Fitting the starter
chain brake might not have enough time to stop the saw • Undo the screw in the centre of the pulley and remove • To fit the starter, first pull out the starter cord and place
chain before it touches you. the pulley. Insert and fasten a new starter cord to the the starter in position against the crankcase. Then
pulley. Wind approx. 3 turns of the starter cord onto slowly release the starter cord so that the pulley
There are also certain positions in which your hand
the pulley. Connect the pulley to the recoil spring so engages with the pawls.
cannot reach the front hand guard to activate the chain
that the end of the spring engages in the pulley. Fit the
brake; for example, when the saw chain is held in felling • Fit and tighten the screws that hold the starter.
Right hand guard screw in the center of the pulley. Insert the starter cord
position.
through the hole in the starter housing and the starter
Will my inertia activated chain brake Apart from protecting your hand if the chain jumps or handle. Make a secure knot in the end of the starter
snaps, the right hand guard stops branches and twigs cord.
always activate during kickback in the from interfering with your grip on the rear handle.
event of a kickback?
No. First your brake must be in working order. Testing the
brake is simple, see instructions under the heading
Checking, maintaining and servicing chain saw safety
equipment. We recommend you do before you begin each
work session. Second the kickback must be strong
Air filter
enough to activate the chain brake. If the chain brake is
too sensitive it would activate all the time which would be
a nuisance. Tensioning the recoil spring
Vibration damping system The air filter must be regularly cleaned to remove dust
Will my chain brake always protect me • Hook the starter cord in the notch in the pulley and
and dirt in order to avoid:
Your machine is equipped with a vibration damping turn the starter pulley about 2 turns clockwise.
from injury in the event of a kickback? • Carburettor malfunctions
system that is designed to reduce vibration and make Note! Check that the pulley can be turned an
No. First, the chain brake must be in working order to • Starting problems
operation easier. additional 1/2 turn when the starter cord is pulled all
provide the intended protection. Second, it must be • Loss of engine power
activated during the kickback as described above to stop the way out.
• Unnecessary wear to engine parts
the saw chain. Third, the chain brake may be activated but • Excessive fuel consumption.
if the bar is too close to you the brake might not have 1
• Remove the air filter after taking off the air filter cover.
enough time to slow down and stop the chain before the When refitting make sure that the air filter seals tightly
chain saw hits you. The machine′s vibration damping system reduces the
against the filter holder. Clean the filter by brushing or
transfer of vibration between the engine unit/cutting
Only you and proper working technique can eliminate shaking it.
equipment and the machine′s handle unit. The body of the
kickback and its danger.
chain saw, including the cutting equipment, is insulated
Throttle lockout from the handles by vibration damping units. 2
The throttle lockout is designed to prevent accidental
operation of the throttle control. When you press the lock
(A) (i.e. when you grasp the handle) it releases the throttle Changing a broken recoil spring
control (B). When you release the handle the throttle
control and the throttle lockout both move back to their
original positions. This arrangement means that the Cutting hardwoods (most broadleaf trees) creates more
throttle control is automatically locked at the idle setting. The filter can be cleaned more thoroughly by washing it in
vibration than cutting softwoods (most conifers). Cutting • Lift off the pulley. See instructions under heading water and detergent.
with cutting equipment that is blunt or faulty (wrong type Changing a broken or worn starter cord.
or badly sharpened) will increase the vibration level. An air filter that has been in use for a long time cannot be
• Remove the recoil spring from inside the pulley by cleaned completely. The filter must therefore be replaced
tapping the pulley lightly with its inside face with a new one at regular intervals. A damaged air filter
downwards against a work bench or the like. If the must always be replaced.
spring pops out during fitting, wind it up again, working
from the outside in towards centre. A HUSQVARNA chain saw can be equipped with different
types of air filters according to working conditions,
weather, season, etc. Contact your dealer for advice.
10 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 35MAINTENANCE GENERAL SAFETY PRECAUTIONS
Vibration damping system Some mufflers are equipped with a special spark arrestor
WARNING! Overexposure to vibration can Cutting equipment
screen. If your machine has this type of muffler, you
should clean the screen at least once a week. This is best ! lead to circulatory damage or nerve
damage in people who have impaired
This section describes how to choose and maintain your
cutting equipment in order to:
done with a wire brush. A blocked screen will cause the
circulation. Contact your doctor if you • Reduce the risk of kickback.
engine to overheat and may lead to serious damage.
Regularly check the vibration damping units for cracks or experience symptoms of overexposure to • Reduce the risk of the saw chain breaking or jumping
Note! The screen must be replaced if it is damaged. If the vibration. Such symptoms include
deformation. off the bar.
screen is blocked the machine will overheat and this will numbness, loss of feeling, tingling,
cause damage to the cylinder and piston. Never use a • Obtain optimal cutting performance.
pricking, pain, loss of strength, changes
machine with a muffler that is in poor condition. Never in skin colour or condition. These • Extend the life of cutting equipment.
use a muffler if the spark arrestor screen is missing symptoms normally appear in the fingers, • Avoid increasing vibration levels.
or defective. hands or wrists. These symptoms may be
Make sure the vibration damping units are securely increased in cold temperatures. General rules
attached to the engine unit and handle unit. • Only use cutting equipment recommended by us!
Stop switch See instructions under the heading Technical data.
Use the stop switch to switch off the engine.
• Keep the chain’s cutting teeth properly
Stop switch sharpened! Follow our instructions and use the
recommended file gauge. A damaged or badly
sharpened chain increases the risk of accidents.
The muffler is designed to reduce the noise level and to
direct the exhaust gases away from the operator. The
Start the engine and make sure the engine stops when exhaust gases are hot and can contain sparks, which may Muffler
you move the stop switch to the stop setting. cause fire if directed against dry and combustible The muffler is designed to keep noise levels to a minimum
material. and to direct exhaust fumes away from the user.
• Maintain the correct depth gauge setting! Follow
Starter WARNING! The exhaust fumes from the
our instructions and use the recommended depth
gauge clearance. Too large a clearance increases
WARNING! When the recoil spring is
! engine are hot and may contain sparks
which can start a fire. Never start the
the risk of kickback.
! wound up in the starter housing it is
under tension and can, if handled
machine indoors or near combustible
material!
carelessly, pop out and cause personal
injury. In areas with a hot, dry climate there is a high risk of fires.
Muffler Care must be exercised when replacing
These areas are sometimes subject to government rules
• Keep the chain properly tensioned! If the chain is
requiring among other things the muffler must be
the return spring or the starter cord. slack it is more likely to jump off and lead to increased
Wear protective glasses and protective equipped with an approved type of spark arrestor screen.
wear on the bar, chain and drive sprocket.
gloves.
Never use a machine that has a faulty muffler.
Changing a broken or worn starter cord
• Keep cutting equipment well lubricated and
properly maintained! A poorly lubricated chain is
CAUTION! The muffler gets very hot during and after more likely to break and lead to increased wear on the
• Loosen the screws that hold the starter against the bar, chain and drive sprocket.
use. This also applies during idling. Be aware of the fire
crankcase and remove the starter.
hazard, especially when working near flammable
substances and/or vapours.
Regularly check that the muffler is securely attached to WARNING! Never use a saw without a
the machine.
! muffler, or with a damaged muffler. A
damaged muffler may substantially
increase the noise level and the fire
hazard. Keep fire fighting equipment
• Pull out the cord approx. 30 cm (12 inches) and hook handy. If a spark arrestor screen is
it into the notch in the rim of the pulley. Release the required in your area, never use the saw
without or with a broken spark arrestor
screen.
34 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 11GENERAL SAFETY PRECAUTIONS MAINTENANCE
Cutting equipment designed to reduce • Number of drive links. The number of drive links is Checking the brake trigger • Check that the throttle control and throttle lockout
determined by the length of the bar, the chain pitch move freely and that the return springs work properly.
kickback and the number of teeth on the bar tip sprocket.
Place the chain saw on firm ground and start it. Make sure
the chain does not touch the ground or any other object.
WARNING! Faulty cutting equipment or See the instructions under the heading Start and stop.
! the wrong combination of bar and saw
chain increases the risk of kickback!
Only use the bar/saw chain combinations
we recommend, and follow the filing • Bar groove width (inches/mm). The groove in the bar
instructions. See instructions under the must match the width of the chain drive links.
heading Technical data. • Start the chain saw and apply full throttle. Release the
throttle control and check that the chain stops and
The only way to avoid kickback is to make sure that the remains stationary. If the chain rotates when the
kickback zone of the bar never touches anything. throttle control is in the idle position you should check
By using cutting equipment with ”built-in” kickback Grasp the chain saw firmly, wrapping your fingers and the carburetor idle adjustment.
reduction and keeping the chain sharp and well- thumbs around the handles.
maintained you can reduce the effects of kickback. • Chain oil hole and hole for chain tensioner. The bar Chain catcher
must be matched to the chain saw design.
Bar
The smaller the tip radius the lower the chance of
kickback. Check that the chain catcher is not damaged and is firmly
Chain attached to the body of the chain saw.
Chain
A chain is made up of a number of links, which are • Chain pitch (inches)
available in standard and low-kickback versions. Apply full throttle and activate the chain brake by tilting
your left wrist forward onto the front hand guard. Do not
IMPORTANT! No saw chain design eliminates the let go of the front handle. The chain should stop
danger of kickback. immediately.
• Drive link width (mm/inches)
WARNING! Any contact with a rotating
! saw chain can cause extremely serious
injuries.
Some terms that describe the bar and chain Throttle lockout
Right hand guard
To maintain the safety features of the cutting equipment, • Number of drive links.
you should replace a worn or damaged bar or chain with
a bar and chain combinations recommended by
Husqvarna. See instructions under the heading Technical • Make sure the throttle control is locked at the idle
Data for a list of replacement bar and chain combinations setting when the throttle lockout is released. Check that the right hand guard is not damaged and that
we recommend. there are no visible defects, such as cracks.
Bar
Sharpening your chain and adjusting
• Length (inches/cm)
depth gauge setting
General information on sharpening cutting teeth
• Never use a blunt chain. When the chain is blunt you
have to exert more pressure to force the bar through
• Number of teeth on bar tip sprocket (T).
the wood and the chips will be very small. If the chain • Press the throttle lockout and make sure it returns to
is very blunt it will produce wood powder and no chips its original position when you release it.
or shavings.
• A sharp chain eats its way through the wood and
produces long, thick chips or shavings.
• Chain pitch (inches). The spacing between the drive
links of the chain must match the spacing of the teeth
on the bar tip sprocket and drive sprocket.
12 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 33MAINTENANCE GENERAL SAFETY PRECAUTIONS
CAUTION! If the high speed jet is screwed in too far, Checking the front hand guard • The cutting part of the chain is called the cutter and data for information on the size of file and gauge that are
it may damage the piston/cylinder. consists of a cutting tooth (A) and the depth gauge recommended for the chain fitted to your chain saw.
When test run at the factory, the high speed jet is set so (B). The cutters cutting depth is determined by the
that the engine satisfies the applicable legal requirements difference in height between the two (depth gauge
at the same time as achieving maximum performance. setting).
Make sure the front hand guard is not damaged and that
The carburetor’s high speed jet is then locked using a there are no visible defects such as cracks.
limiter cap in the fully screwed out position. The limiter cap
limits the potential to adjust the high speed jet to at most • Check that the chain is correctly tensioned. A slack
half a turn. chain will move sideways, making it more difficult to
To adjust the carburetor correctly you should contact a sharpen correctly.
mechanic with access to a rev counter.
When you sharpen a cutting tooth there are four important
CAUTION! As the spark is cut off, the rev counter does not Move the front hand guard forwards and back to make factors to remember.
show speeds higher than 13600 rpm. sure it moves freely and that it is securely anchored to the 1 Filing angle
Correctly adjusted carburetor clutch cover. • Always file cutting teeth from the inside face. Reduce
the pressure on the return stroke. File all the teeth on
When the carburetor is correctly adjusted the machine one side first, then turn the chain saw and file the teeth
accelerates without hesitation and the machine 4-cycles on the other side.
a little at max. speed. It is also important that the chain
does not rotate at idle. If the L-jet is set too lean it may
cause starting difficulties and poor acceleration. If the H-
jet is set too lean the machine will have less power, poor 2 Cutting angle
acceleration and could suffer damage to the engine.
Checking the inertia brake release
Checking, maintaining and
• File all the teeth to the same length. When the length
servicing chain saw safety of the cutting teeth is reduced to 5/32 inch (4 mm) the
equipment 3 File position chain is worn out and should be replaced.
With the engine turned off, hold the chain saw over a
stump or other firm object. Let go of the front handle so
Note! All servicing and repair work on the machine that the bar drops towards the stump as the chain saw
requires special training. This is especially true of the rotates around the rear handle.
machine′s safety equipment. If your machine fails any of 4 Round file diameter
the checks described below we recommend you to
contact our servicing dealer.
General advice on adjusting depth gauge setting
• When you sharpen the cutting tooth (A) the depth
Chain brake and front hand guard It is very difficult to sharpen a chain correctly without the gauge setting (C) will decrease. To maintain optimal
right equipment. We recommend that you use our file cutting performance the depth gauge (B) has to be
Checking brake band wear
gauge. This will help you obtain the maximum kickback filed down to achieve the recommended depth gauge
reduction and cutting performance from your chain. setting. See instructions under the heading Technical
data to find the correct depth gauge setting for your
particular chain.
Brush off any wood dust, resin and dirt from the chain
brake and clutch drum. Dirt and wear can impair When the bar hits the stump the brake should be
operation of the brake. applied.
See instructions under the heading Technical data for
information about sharpening your chain.
WARNING! The risk of kickback is
!
WARNING! Departure from the
sharpening instructions considerably ! increased if the depth gauge setting is
too large!
increases the risk of kickback.
Adjustment of depth gauge setting
Sharpening cutting teeth
Regularly check that the brake band is at least 0.024 inch
(0.6 mm) thick at its thinnest point.
• The cutting teeth should be newly sharpened before
To sharpen cutting teeth you will need a round file and a adjusting the depth gauge setting. We recommend
file gauge. See instructions under the heading Technical that you adjust the depth gauge setting every third
time you sharpen the cutting teeth. NOTE! This
32 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 13GENERAL SAFETY PRECAUTIONS MAINTENANCE
recommendation assumes that the length of the
cutting teeth is not reduced excessively.
• Raise the tip of the bar and stretch the chain by General Basic settings and running in
tightening the chain tensioning screw using the
combination spanner. Tighten the chain until it does The user must only carry out the maintenance and The basic carburetor settings are adjusted during testing
• You will need a flat file and a depth gauge tool. We
not sag from the underside of the bar. service work described in this manual. More extensive at the factory. Avoid running at a too high speed for
recommend that you use our depth gauge tool to
work must be carried out by an authorized service extended periods during the first 10 hours.
acheive the correct depth gauge setting and bevel for
the depth gauge. workshop. CAUTION! If the chain rotates while idling the T-screw
must be turned anti-clockwise until the chain stops.
Carburetor adjustment Rec. idle speed: 2700 rpm
Due to existing environmental and emissions legislation
• Use the combination spanner to tighten the bar nuts your chain saw is equipped with movement limiters on the Fine adjustment
while lifting the tip of the bar at the same time. Check carburetor adjuster screws. These limit the adjustment When the machine has been ”run-in” the carburetor
that you can pull the chain round freely by hand and possibilities to a maximum of a 1/2 turn. should be finely adjusted. The fine adjustment should
• Place the depth gauge tool over the chain. Detailed
that it does not sag from the underside of the bar. be carried out by a qualified person. First adjust the L-
information regarding the use of the depth gauge tool,
will be found on the package for the depth gauge tool. L
H jet, then the idling screw T and then the H-jet.
Use the flat file to file off the tip of the depth gauge that
Conditions
protrudes through the depth gauge tool. The depth 1/2
gauge setting is correct when you no longer feel • Before any adjustments are made the air filter should
resistance as you draw the file along the depth gauge The position of the chain tensioning screw on our chain 1/2 be clean and the cylinder cover fitted. Adjusting the
tool. saws varies from model to model. See instructions under carburetor while a dirty air filter is in use will result in
the heading What is what? to find out where it is on your a leaner mixture next time the filter is cleaned. This
model. Your Husqvarna product has been designed and can give rise to serious engine damage.
manufactured to specifications that reduce harmful • Do not attempt to adjust the L and H jets beyond
455e Rancher emissions. either stop as this could cause damage.
Function • Now start the machine according to the starting
Tensioning the chain instructions and let it warm up for 10 minutes.
• The carburetor governs the engine’s speed via the
• Release the knob by folding it out. throttle control. Air and fuel are mixed in the • Place the machine on a flat surface so that the bar
carburetor. The air/fuel mixture is adjustable. Correct points away from you and so that the bar and chain do
adjustment is essential to get the best performance not come into contact with the surface or other
from the machine. objects.
WARNING! A slack chain may jump off
! the bar and cause serious or even fatal
injury.
• The setting of the carburetor means that the engine is
adapted to local conditions, for example, the climate,
Low speed jet L
Turn the low speed jet L clockwise until it stops. If the
altitude, fuel and the type of 2-stroke oil.
engine accelerates poorly or idles unevenly, turn the low
The more you use a chain the longer it becomes. It is • The carburetor has three adjustment controls: speed jet L anticlockwise until good acceleration and
therefore important to adjust the chain regularly to take up - L = Low speed jet idling are achieved.
the slack. - H = High speed jet
• Turn the knob anti clockwise to loosen the bar cover. Fine adjustment of the idling speed T
Check the chain tension every time you refuel. NOTE! A - T = Idle adjustment screw
new chain has a running-in period during which you Adjust the idle speed with the T-screw. If it is necessary to
should check the tension more frequently. L re-adjust, turn the T-screw clockwise while the engine is
Tension the chain as tightly as possible, but not so tight H running, until the chain starts to rotate. Then turn counter-
that you cannot pull it round freely by hand. clockwise until the chain stops. A correctly adjusted idle
speed setting occurs when the engine runs smoothly in
every position. It should also be good margin to the rpm
when the chain starts to rotate.
• Adjust the tension on the chain by turning the wheel
down (+) for tighter tension and up (-) to loosen the T WARNING! Contact your servicing
455 Rancher, 460 Rancher
tension. • The L and H-jets are used to adjust the supply of fuel
to match the rate that air is admitted, which is
! dealer, if the idle speed setting cannot be
adjusted so that the chain stops at idle.
controlled with the throttle. If they are screwed Do not use the chain saw until it has
clockwise the air/fuel ratio becomes leaner (less fuel) been properly adjusted or repaired.
and if they are turned anti-clockwise the ratio
becomes richer (more fuel). A lean mixture gives a High speed jet H
• Loosen the bar nuts that hold the clutch cover/chain
higher engine speed and a rich mixture gives a lower
brake. Use the combination spanner. Then tighten the At the factory the engine is adjusted at sea level.
engine speed.
bar nuts by hand as tight as you can. When working at a high altitude or in different
• The T-screw regulates the throttle setting at idle
weather conditions, temperatures and atmospheric
speed. If the T-screw is turned clockwise this gives a
humidity, it may be necessary to make minor
higher idle speed; turning it anti-clockwise gives a
adjustments to the high speed jet.
lower idle speed.
14 – English 1153137-95 Rev.2 2009-12-29 1153137-95 Rev.2 2009-12-29 English – 31You can also read
